Cognitive Load and Smartphones: How Mere Presence Impacts Mental Performance

This study examines the impact of smartphone presence on cognitive performance, specifically evaluating attention (AP score), processing speed (PTO score), and error percentage (E% score) among 275 undergraduate students.Participants were assigned to conditions varying in smartphone proximity: on a desk, in a pocket/bag, in another room, or completely absent.One-tailed ANOVA results revealed that participants without smartphones performed significantly better in attention and processing speed, with large effect sizes ( = 0.134 and = 0.160, respectively).Descriptive statistics indicated that female participants outperformed males across all cognitive measures.The findings support the "brain drain" hypothesis, showing that even the mere presence of a smartphone reduces cognitive efficiency.Correlation analysis further confirmed that cognitive performance declines most when smartphones are visible or within reach.The results underscore the need to minimize smartphone presence in academic and professional settings to enhance focus and productivity.Future research should investigate long-term effects and develop interventions to mitigate cognitive depletion linked to smartphones.